THS4551 Fully Differential Amplifier Overview

[MUSIC PLAYING] Hello, I'm Anthony Vaughan with Texas Instruments High Speed Amplifier Marketing Team. Today I will introduce TI's THS4551 low noise, rail-to-rail output, fully differential amplifier that's ideal for use in driving differential active filter designs and for driving the input of high resolution delta sigma and SAR analog to digital converters. The THS4551 is also a great pin compatible upgrade from the very popular THS4521 amplifier family.
The THS4551 single channel, fully differential amplifier features an impressive input voltage noise of only 3.3 nanovolts per root hertz. It's operated off of a 2.7 volt to 5.4 volt single supply and has a typical quiescent current of only 1.35 milliamps. The device also features a pin activated power down mode where the device only consumes 2 microamps.
The amplifier also offers stellar performance with a unity gain bandwidth of 150 megahertz and a total harmonic distortion of negative 126dB at 100 kilohertz 2 volt peak-to-peak. The device also offers a wide operating temperature range between negative 40 and 125 degrees Celsius, making it well-suited for use in almost all consumer and industrial applications.
One of the most common applications for the THS4551 is to drive the input of high resolution analog to digital converters. This block diagram shows the amplifier configured to convert a single-ended input to a differential output with a multiple feedback filter driving TI's fully differential ADS127L01 24-bit precision delta sigma ADC. The th has been designed to drive a number of other popular TI ADCs. Some of the more common devices, in addition to the ADS127L01, include the 18-bit, 1 megasample percent ADS8881 and the ADS8910B SAR ADCs, the 18-bit 2 megasample per second ADS9110 SAR ADC, and the high speed 14-bit, 25 megasample per second ADC3241 Pipeline ADC.
The THS4551 is also available in several different packages to provide multiple PCB mounting options. These packages include an 8-pin SOIC leaded package, an ultra-small 2x2 millimeter, 10-pin WQFN package, and a 16-pin VQFN option. The 8-pin packet is pin compatible with the very popular THS4521 amplifier, making upgrades from previous designs quick and easy.
There are several resources available to help you quickly evaluate and start development with the THS4551. Visit the Tools and Software tab of the THS4551 webpage at the link below. In the model areas of this page, you will find both TINA-TI-based reference designs and the TINA-TI SPICE model for the THS4551. If you don't already have the TINA-TI SPICE simulation program, it can be downloaded in the Development Tools section of this webpage. There are also hardware design kits and evaluation modules, or EVMs, that are available for purchase on this webpage.
If you'd like to evaluate the THS4551 as a precision driver for a high resolution 24-bit delta sigma ADC, then the ADS127L01 is a great kit for you. This kit comes with two SMA input connectors that supply the input signals to the th amplifier. The amplifier is then used to drive the differential inputs of the ADS127L01 ADC. This board also features a TI TM4C1294 Tiva C series microcontroller that serves as an interface between the SPI port of the ADC and the USB connector of a PC.
The kit also includes software applications that run on a PC that will allow data collection and analysis from the EVM board. For more information about this kit, visit the webpage shown on the screen. If you'd like to evaluate the th as a standalone amplifier, or use it to drive a circuit on your own, the th DGK EVM is the perfect kit for you.
This evaluation module is designed to quickly and easily demonstrate the functionality and versatility of the amplifier. The board can be connected to an external power source, signal source, and test instruments through the use of onboard connectors. The EVM comes configured for easy connection with common 50-ohm laboratory equipment on its inputs and outputs.
For more information about this kit, visit the website shown on the screen. For more information about TI's THS4551 amplifier, and to download the device datasheet, visit the link below. To see TI's entire portfolio of fully differential amplifiers, check out ti.com/fda. I hope that you have found this overview useful. Thanks for watching.
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Description

August 12, 2016

This video provides an overview of the THS4551 low noise, 150MHz fully differential amplifier that is ideal for use in differential active filter designs and for driving the input of high resolution Delta-Sigma and SAR analog-to-digital converters. The video features information about available TINA-TI SPICE models and evaluation kits featuring the amplifier like the ADS127L01 24-bit Delta-Sigma ADC EVM.